Cassava vs YamsCassava is really taste, more delicious but yams is good truly

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Deby Jannati (16) and Mazia Shona (17), high school students Universe Semarang, Central Java, to prove that the skin of cassava can be used activated carbon material. Activated carbon was able to absorb 99.98 percent copper content in waste water.

Deby and the Shona, who represented Indonesia, won first prize in the event Mostratec in Novo Hamburgo, Brazil, which took place on 24-31 October. Event was followed by high school students from 22 countries in Asia, Europe, and Latin America."Normally the activated carbon made from coconut shell. Apparently, the skin of cassava that had been underutilized also contains carbon, "said Shona.

He accidentally learned from his school work that the skin of cassava contain 59.31 percent carbon. He is often seen activated carbon used to purify water in the school dormitory bathroom.

"I think, the skin can also be made of cassava active carbon. In addition to increasing the economic value of cassava skin, making activated carbon from cassava skin more environmentally friendly, "said Shona.Deby said activated carbon made from cassava skin with skin drying cassava, followed on such devices oven to 800 degrees Celsius for three hours. The result crushed and activated with NaOH solution.

When tested by atomic absorption spectrophotometer, the resulting activated carbon was able to absorb 99.98 percent of its copper (Cu). Laboratory test results, as many as 20 milliliters of synthetic waste containing CuSO4 able bleached with 2 grams of active carbon cassava skin within 40 minutes.

"Not just for water purification, activated carbon is also used for diarrhea. We want someone to continue this research to be applied in life, "said Shona. (UTIs)